and they all went for president obama in 2008. karen travers, abc news, washington. >>> we have the most convincing evidence yet that water once flowed on mars. nasa's rover curiosity, beaming back pictures with pebbles that are rounded off. a fast-moving stream once flowed on the red planet. finding past water is the first step to find out if the environment was able to sustain life. >>> time, now, for weather across the nation. heavy downpours and flooding around boston, new york, philly and d.c. thunderstorms from the ohio valley to memphis and little rock. scattered showers along the gulf coast. and drenching rain in west texas. showers in the rockies. >>> 70s from billings to albuquerque. and in the middle of the country, from minneapolis to kansas city. 80s across the south. >>> and when we come back, get ready for a ferris wheel that can carry, get this, more than 1,400 riders at 1 time. >> if that doesn't get stuck. >>> more big banks getting caught up in a wave of cyber attacks. but who's behind them? >>> and we're talkin